Oil and grease proof paper and container made therefrom



v 1,633,787 June 28, 1927. O. KRESS OIL AND GREASE PROOF PAPER ANDCONTAINER MADE THEREFROM Filed Aug. 1. 1925 InvG-71237? @25 f7-S566,

y .iQ/:

- UNITED STA `OF APPLETON, WISCONSIN, ASSIGNOR T0 AMERICAN LAKES PAPERCOM- Patented I J une 28, 1927.

TES

' OTTO KRESS,

'.PANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF DELAWARE.

OIL AND GREASE PROOF PAPER AND CONTAINER MADE THEREFROM.

Application illed August lThe present invention has primarily for itsobject the provision of an improved com posite paper sheet adapted tocarry olls, lard, grease, and like materials, and to provide anefficient and inexpensive contalner made therefrom, whereby suchmaterials as gasoline, lubricating oil, lard, grease, or the like may becarried, the container being of such cheap construction that after ithas been used once it may be discarded.

I have discovered that it is possible to render sheets -of paperimpermeable to the passage of oils and grease if such sheets are unitedtogether'by a non-drying cement, insoluble in oil and carrying Water insufiicient quantity to prevent the passage of oil therethrough, thisbeing due to the fact that the `water carried by the cement repels thepassage of oil and grease. I have found also that a container made fromsheets of paper so united together will for a long period of timeeffectively serve to retain oils, grease, or the like, the water carriedby the cement that unites the sheets repelling the oil or grease, whichotherwise would pass through the pores of the paper.

The invention consists in the features of novelty hereinafter described,illustrated in the accompanying drawing and particularly pointed outinthe claims at the end of this specification.

Figure 1 is a sectional view showing a composite paper sheet formed oftWo sheets of paper united together in accordance with my invention;Figure 2 is a perspective view showing a bag-shaped container embodyingmy invention; Figure 3 is a sectional view showing a plurality of sheetsof paper united together by an oil and grease proof cement, these sheetsbeing given greater body by having united thereto a sheet of paperboard; Figure 4 is a perspective view of a container in the form of a.box or carton made from the composite sheet illustrated in Fig. 8 of thedrawing; Figure 5 is a seetional view similar to Fig, 1, but having apaper sheet united thereto by Waterproof cement; and Figure 6 is a viewsimilar to Fig. 3, with an additional sheet of paper united thereto by awaterproof cement.

Referring to Figs. 1 and 2 of the drawing,

1, 1925. Serial No. 47,439.

A and B designate two sheets of paper and C denotes a thin film ofadhesive material whereby the sheets will be inseparably unitedtogether. The sheets of paper A and B ma be of any suitable character orquality, a though I prefer to employ so-called greaseproof papers, suchas are known in the trade under the names of grease proof, glassine andvegetable parchment. In preparing the composite sheet illustrated inFig. 1, I prefer to apply the adhesive to the opposmg surfaces of twosheets A and B, 1n order to be absolutely sure of a continuous film ofsuch adhesive over the sheets, although if desired, the adhesive C maybe applied .to the surface of one sheet of paper only and the othersheet may be then firmly pressed thereon. While I regard it within thebroad scope of my invention to employ for uniting the sheets of paperany suitable cement or adhesive that will carry water in sufiicientquantity to prevent the passage therethrough of oil or grease, onepreferred adhesive which gives very satisfactory results consists of astrong solution of commereial/glucose which may be varied.inconcentration from 40 to 70% of actual Weight of dry glucose; that is tosay, the solution may contain from 60 to 30% of Water. In order torender the film more fiexible, there may be added, if desired, from 5 to30% of glycerine, which will serve to maintain the film in moistcondition and prevent the evaporation of the water for a long period. Ifdesired, also, there may be added to the glucose solution from 5 to 30%in 'weight of dry calcium chloride, as this salt is very hygroscopic andWill fend to draw moisture and so maintain the water content of theadhesive for a long period. An adhesive such, for example, as that abovedescribed.,

Will be found to be insoluble in oil and to carry Water in sufficientquantity to prevent the passage of oil therethrough, and is, in effect,non-drying. By the term non-drying, I mean that the adhesive is of suchcharacter that the moisture thereof will not evaporate or -dry out for along period of time. v

The composite sheet of paper such as illustrated in Fig. 1 of thedrawing may be made u into a variety of 'l'orms of container-s for odsor grease. In Fig. 2, the composite sheet is shown as formed into abag-like container, the top of which is closed in` any suitable mannerand is provided with a lling tube D of suitable material, and having aconvenient handle E whereby the bag may he carried. Bags of thischaracter can be very cheaply made, and the material being iexible, canbe conveniently stored for use. When such a bag or container is filledwith oil (gasoline, for example), it will be found that while the oilwill 1n time penetrate the interior sheet, the Water carried by the filmof non-drying cement or adhesive will prevent the passage of the oilthrough the bag. If desired, the outer surface of the ba or containermay be covered with an a dtional sheet of pa er such as Kraft paper)pasted thereto an serving to strengthen the bag.

In Fig. 3 of the drawing is shown a composite sheet rendered somewhatheavier than the composite sheet illustrated in Fig. l and betteradapted for forming boxes or cartons for containing lard, grease, orother oily materials. This composite sheet is shown as formed of papersheets A and B united by a film C of oil or grease proof cement asheretotore described, a sheet of paper board A2 being shown as united tothe sheet A by a ilm A3 of suitable cement, such as silicate of soda,starch paste, or the like.

In Fig. 4 there is shown a box or carton made from the composite sheetillustrated in Fig. 3. This carton may comprise a body portion ofordinary shape and construction, having end flaps at its top adapted tobe turned inward after the boX has been filled.

Tt it is desired to make the container moisture proof, as well as oiland grease proof,

' a further sheet of paper may be connected to the outside ofthe-container by a thin film of 4asphalt cement. Thus in Fig. 5, I haveshown a composite sheet similar to that illustrated in Fig. l, buthaving an outer sheet A4 united to the sheet of paper A by a thin filmAli of asphalt. So, also, in Fig. 6 is shown a composite sheet similarto that illustrated in Fig. 3, but having an outer sheet A4 united tothe sheet of paper board A2 by a thin film of asphalt or equivalentWaterproof cement.

Figures 1, 3, 5 and 6 are necessarily exaggerated in order to show theelements comprising the composite sheets, but it will be understood thatthe composite sheets shown in Figs. 1 and 5 are suliiciently thin andflexible to permit the formation of baglike containers, and thecomposite sheets shown in Figs. 3 and 6, while somewhat thicker andsomewhat stifler, are sufiiciently iiexible to form cartons orcontainers such as illustrated in Fig. 4.

My improved composite paper sheet will be found not only sufficientlyflexible to enable containers such as above described to be -formedtherefrom, but the film or films et' cement en'iployed in uniting thesheets of paper are of such non-drying, flexible character, that it willnot become brittle and will not crack when the containers are folded,scored, printed upon or carelessly handled. The composite sheetillustrated in Figs. 1 and 5 of the drawing will be found particularlywell adapted in the lining of boxes, barrels, or the ike, that are tocontain oils, solid grease, or like materials.

The details above described and the precise character and composition'ofthe oil and grease proof cement may be varied without departure from thebroad scope of the invention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. A composite oil and grease proof sheetcomprising two sheets of paper permanently united together by anon-drying cement insoluble in oil and carrying water in sufficientquantity to prevent the passage of oil therethrough.

2. A composite oil and grease proof sheet comprising two sheets of paperpermanently united together by a non-drying cement insoluble in oil andcarrying water in suiticient quantity to prevent the passage of oiltherethrough and having a supplemental sheet united thereto by a filmof/ waterproof cement.

3. A composite oil and grease proof sheet comprising two sheets of paperunited together by a non-drying vcement consisting mainly of glucose andwater.

4. A container for oil, lard, or like material comprising sheets ofpaper united together by a non-drying cement, insoluble in oil, andcarrying water in suilicient quantity to prevent the passage of oiltherethrough.

5. A container for oil, lard, or like material comprising sheets ofpaper united together by a non-drying cement, insoluble in oil, andcarrying Water in suiicient quantity to prevent the passage of oiltherethrough, one of said sheets having a supplemental sheet unitedthereto by a waterproof cement.

6. A container for oil, lard, or like material comprisinga paper boardhaving upon one side a sheet of paper-united thereto by a ihn of asphaltand having -`united to its other side at least two sheets `.ofpaper con.

nected together by a non-drying cement, insoluble in oil, andearryingwater in suiiicient quantity to prevent the passage of oil therethrough.

7. A composite oil and grease proof sheet comprising two4 sheets ofpaper united together by a non-drying cement consisting mi'nly ofglucose, Water and calcium chlori e.

8. A composite oil and grease proof sheet comprising two sheets of paperunited together by a non-drying cement consisting mainly of glucose,water, calcium chloride and glycerine.

9. The method of making an oil and grease proof container that consistsin interposing between two sheets of paper a nondrying cement inso water1n' suicient passage of oil therethrough,

incorporating said contamer.

luble in oil and carrying quantity to prevent the and thereafter 10sheet 1n the form of a OTTO KRESS.

